JP2003305522A - Press forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a press forming device having good productivity capable of inhibiting equipment costs without complexity of structures and growing the press forming device in size. <P>SOLUTION: The press forming device has a guide means 10 for keeping the accuracy of the relative position between a lower mold 2 and an upper mold 3 by moving the upper mold 3 downward and inserting a point edge 11a of the guide post 11 arranged in the lower mold 2 into the guide bush 12 engaged into the guide bush ole 14 which is pierced in the upper mold 3, and a device 20 for generating a compressed air in the guide bush ole 14 with the progress of the guide post 11 into the guide bush 12 by moving the upper mold 3 downward. The guide bush 12 and the guide post 11 of the guide means 10 have functions of a cylinder and a piston of the compressed air generating device 20 respectively, and the compressed air generating device 20, whose main part is the structure of the guide means 10, can be additionally arranged. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressing device, and more particularly to a pressing device equipped with a compressed air generating device or a negative pressure generating device.

[0002]

2. Description of the Related Art In a press machine for pressing a work by an upper die and a lower die, when the upper die or the lower die is pressed with foreign matter such as chips, the foreign matter causes the foreign matter to pimple or divot. May be scratched or deformed. As a countermeasure against this, an air blower for removing foreign matter such as chips by blowing compressed air from a compressed air generator in the factory between the upper die and the lower die is provided.

Further, in Japanese Unexamined Patent Publication No. 6-269868, air ejection holes are opened in at least one machining surface of the upper die and the lower die, and after the press working is completed, the upper die rises from the bottom dead center. The compressed air is ejected from the air ejection hole within a predetermined time to open the die, and the negative pressure area generated between the die and the work is brought to atmospheric pressure or higher, and foreign matter such as chips is caught in the machined surface. It is disclosed to prevent the adhesion and adhesion.

Further, in a press device for performing piercing, as disclosed in Japanese Patent Application Laid-Open No. 11-320,000 and a sectional view of a main part is shown in FIG. 11, a work is provided between an upper die 101 and a lower die 102. After sandwiching and positioning W, the upper die 101 is further lowered, and the work W is desired by the punching punch 104 provided on the upper die 101 and the punching die 106 provided on the die plate 105 of the lower die 102. Punch into the shape of. Then, the punched waste Wa is punched out, and the upper die 10
Compressed air generating device 107 that operates according to the descending motion of No. 1
The compressed air 110 generated in 1) is ejected from the air ejection hole 109 via the air inflow hole 108, and with the ejection of the compressed air 110, the dust discharge hole 11 above the air ejection hole 109.
1 becomes negative pressure and is sucked downward, and then compressed air 11
0 is forcibly discharged below the lower mold 102.

[0005]

The air blower for blowing foreign matter by blowing compressed air between the upper die and the lower die must be provided with a compressed air generator in addition to the press device, and the compressed air must be compressed. Equipment such as a pipeline for supplying compressed air from the air generator to the air blower is required, which leads to an increase in equipment cost. Further, since the air blower is provided in the press machine, the press machine is enlarged and the structure is reduced. It becomes a factor that causes complication.

Also in the above-mentioned Japanese Patent Laid-Open No. 6-269868, there is provided a compressed air generator for supplying compressed air to the press device, and a pipe for supplying compressed air from the compressed air generator to the press device. This is a factor that requires equipment and causes an increase in equipment cost.

According to Japanese Patent Laid-Open No. 11-320,000, the compressed air generator 107 is installed in the press device separately from the press device by arranging the compressed air generator 107 for generating compressed air by the lowering operation of the upper die 101. It is possible to simplify the piping without doing so.

However, since the dedicated compressed air generating device 107 is provided in the pressing device, the structure of the pressing device becomes complicated, the equipment cost increases, and the pressing device becomes large in size. Further, there is a concern that the installation of the compressed air generation device 107 limits the work space for inspection and die replacement of the press device, which affects the workability.

Further, in Japanese Patent Laid-Open No. 11-320,000, the compressed air 1 generated by the compressed air generator 107 is used.
10 is spouted to the dust discharge hole 111, and the dust discharge hole 11
Although the inside of 1 has a negative pressure to suck and discharge the punched dust, it is conceivable that the negative pressure generation device causes the dust discharge hole 111 to have a negative pressure to suck and discharge the punched dust. A pressure generator is required, and there is a concern that similar problems will occur.

Therefore, an object of the present invention made in view of the above point is to provide a press apparatus which can be expected to suppress the equipment cost without complicating the structure and increasing the size of the press apparatus and which is excellent in workability. Especially.

[0011]

The invention of a press device according to claim 1 for achieving the above object comprises a lower die and an upper die that moves up and down so as to face the lower die, and As the lower die or the upper die moves, the tip of a guide post provided in one of the lower die and the upper die fits into a guide bush fitted in a guide bush hole formed in the other die and A press device equipped with guide means for ensuring relative positional accuracy, comprising a compressed air generating device for generating compressed air in a guide bush hole sealed by the guide post entering the guide bush when the upper die descends. Is characterized by.

According to the first aspect of the present invention, the guide bush and the guide post of the guide means have the functions of the cylinder and the piston of the compressed air generator, respectively. It is possible to attach a compressed air generating device mainly composed of the guide means to the press device, and it is not necessary to dispose a dedicated compressed air generating device separately, resulting in a complicated and large-sized structure of the press device. The equipment cost can be suppressed without Also,
It is possible to easily secure a work space for inspection of the press device and mold replacement without being affected by the installation of the compressed air generator, and to obtain excellent workability.

According to a second aspect of the present invention, in the press apparatus according to the first aspect, the compressed air generator compresses compressed air in the check valve and the guide bush hole for introducing outside air into the guide bush hole. It is characterized by being provided with a check valve for supplying to the air use portion.

A second aspect of the present invention is a more specific version of the first aspect of the present invention, in which one check valve is provided when the guide post moves out of the guide bush as the upper die rises. By introducing the outside air through the, it is possible to suppress excessive negative pressure from being generated in the guide bush hole, and to ensure a smooth operation of the compressed air generating device.

According to a third aspect of the present invention, in the press apparatus according to the second aspect, the check valve for introducing the outside air is in communication with the negative pressure using portion.

According to the third aspect of the present invention, by connecting the check valve for introducing the outside air to the negative pressure using portion, the negative pressure generated in the guide bush as the upper die is raised causes the negative pressure using portion to be negative. Pressure can be generated, and the function as a negative pressure generator can be added to the compression generator.

According to a fourth aspect of the present invention, there is provided a press apparatus including a lower die and an upper die that moves up and down so as to face the lower die, and the lower die or the upper die moves as the upper die descends. The guide post provided on one side is fitted with the guide means fitted in the guide bush fitted into the guide bush hole formed on the other side to secure the relative positional accuracy of the lower die and the upper die. The press device is characterized by including a negative pressure generating device for generating a negative pressure in the sealed guide bush hole by the withdrawal operation of the guide post in the guide bush due to the upward movement of the upper die.

According to the invention of claim 4, since the guide bush and the guide post of the guide means also have the functions of the cylinder and the piston of the negative pressure generating device, respectively.
A negative pressure generating device whose main part is a configuration of existing guide means conventionally arranged in the pressing device can be attached to the pressing device, and it is not necessary to separately provide a dedicated negative pressure generating device. Equipment costs can be suppressed without complicating the structure of the press device and increasing the size thereof. Further, it is possible to easily secure a work space for inspecting the press device and exchanging the mold without being affected by the attachment of the negative pressure generating device, and to obtain excellent workability.

According to a fifth aspect of the present invention, in the press apparatus according to the fourth aspect, the negative pressure generating device includes a check valve and a guide bush that prevent an air flow from the inside of the guide bush hole to the negative pressure using portion. It is characterized by being provided with a check valve for discharging the compressed air generated in the hole to the outside.

The invention of claim 5 is a more specific version of the invention of claim 4, wherein the guide post enters the guide bush as the upper die is lowered, and the pressure in the guide bush hole is reduced. When rising, the compressed air is discharged to the outside via the one check valve, the pressure increase in the guide bush hole is suppressed, and a smooth operation of the negative pressure generating device can be ensured.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a press device according to the present invention will be described below with reference to the drawings.

(First Embodiment) A first embodiment of the pressing apparatus of the present invention will be described with reference to FIGS. 1 to 5.

FIG. 1 is a sectional view showing the main part of the press machine 1,
FIG. 2 is an overall schematic explanatory diagram. An upper die 3 is disposed above the lower die 2 so as to face the lower die 2 so as to be movable up and down, and the upper die 3 is lowered to process the machining surface 4a of a pad 4 provided on the upper die 3 and the lower die 2. A work (not shown) is pressed between the surface 2a. After the press working is completed, the upper die 3 is lifted from the bottom dead center and the die is opened, and the pressed work is carried out.

In the press device 1, as shown in FIG. 1, a guide post 11 and a guide bush 12 which are fitted to each other to secure the relative positional accuracy of the lower die 2 and the upper die 3 are provided opposite to each other. Means 10 are provided. The guide means 10 including the guide post 11 and the guide bush 12 is arranged at a plurality of places as required.

The guide post 11 is formed into a cylindrical shape whose base end is press-fitted or fixed by a taper pin (not shown) in a guide pin hole 13 bored in the lower die 2, and the tip 11
a is provided so as to project upward.

On the other hand, the guide bush 12 has a step portion 14 which is formed by penetrating the upper mold 3 coaxially with the guide post 11.
A cylindrical guide bush hole 14 having a has a cylindrical shape that is press-fitted and fitted with its upper end in contact with the stepped portion 14a. Inner peripheral surface 1 of the guide bush 12
2a is formed with high accuracy so that the guide post 11 can be fitted therein, and an O-ring 15 which is an annular sealing material that hermetically seals the guide post 11 is attached near the lower end edge of the inner peripheral surface 12a. There is.

The upper end of the guide bush hole 14 is sealed by an upper lid 17 which is attached to the upper mold 3 by a mounting bolt with a gasket 16 interposed. Top 17
The introduction hole 17a is bored in the
A check valve 18 for introducing outside air into the guide bush hole 14 is provided. Further, a discharge hole 17b is formed in the upper lid 17, and the discharge hole 17b is provided with a pressure regulating valve 19 having a check valve function and a pipe line 22 for accumulator 2.
It communicates with 3.

These guide posts 11, guide bush holes 14, guide bushes 12, upper lids 17, check valves 1
8 and the pressure regulating valve 19 compress the air in the guide bush hole 14 sealed by the guide post 11 that moves into the guide bush 12 to generate compressed air, and compress the compressed air in the accumulator 23 via the pressure regulating valve 19. A compressed air generator 20 for supplying air is configured.
That is, the guide bush 12 functions as a cylinder, and the guide post 11 functions as a piston, and the compressed air generating device 20 having the structure of the existing guide means 10 as a main part.
Is configured.

The accumulator 23, as shown in FIG.
Via the control valve 24, it communicates with the ejection hole 25 formed in the machined surface 4a of the pad 4 as a compressed air use portion. The compressed air stored in the accumulator 23 is ejected from the ejection hole 25 by the operation control of the control valve 24 when the upper mold 3 is raised.

Although detailed description is omitted, the compressed air generators 20 are formed in the guide means 10 arranged at other positions with the same structure, and the compressed air generators 20 compress the accumulators 23. Air is supplied.

Next, the press device 1 configured as described above.
The operation of will be described.

With the control valve 23 closed, the upper die 3 is lowered from the raised position shown in FIG. 1 and press working is performed by the working surface 4a of the pad 4 and the working surface 2a of the lower mold 2.

When lowering the upper mold 3, the tip 11a of the guide post 11 of the guide means 10 erected on the lower mold 2 is moved downward as the upper mold 3 descends, as shown in FIG. The relative position accuracy of the lower mold 2 and the upper mold 3 is ensured by the guide post 11 and the guide bush 12 which enter through the opening 12b at the lower end of the guide bush 12 provided in the. Further, as the upper die 3 descends, it further enters the guide bush 12 as shown in FIG. 4, and the tip 11a of the guide post 11 enters the guide bush 12 until the upper die 3 shown in FIG. 5 reaches the bottom dead center. .

Guide bush 1 of this guide post 11
The air in the guide bush hole 14 that is sealed by the advancing operation in 2 is compressed, and the compressed air is compressed by the pressure regulating valve 1.
It is pressure-fed to the accumulator 23 via 9 and the pipe 22, and is stored in the accumulator 23.

When the compressed air stored in the accumulator 23 becomes equal to or higher than a preset predetermined pressure, the pressure regulating valve 1
It is discharged from 9 and kept at a constant pressure.

When the pressing of the work is completed and the upper die 3 starts to move upward from the bottom dead center, the guide post 11 comes out of the guide bush 12 and operates. Guide post 1
The inside of the guide bush hole 14 becomes negative pressure due to the withdrawal operation in the guide bush 12 of No. 1, but this negative pressure opens the check valve 18 and the outside air is taken into the guide bush hole 14 from the pipe line 21. Therefore, the guide post 11 can be smoothly pulled out from the guide bush 12 without excessive negative pressure in the guide bush hole 14, and the smooth guide means 10 and the compressed air generating device 2 can be obtained.
Operation of 0 can be secured.

On the other hand, within a predetermined period after the upper die 3 starts to move upward and the upper die 3 moves upward to open the die, for example, the machined surface 4 of the pad 4
The control valve 24 is opened only until a is separated from the work and the machining surface 4a and the work communicate with the outside, and compressed air is jetted and supplied from the jet hole 25 to create a space between the pad 4 and the work. By making the negative pressure region equal to or higher than the atmospheric pressure, the air around the lower mold 2 and the upper mold 3 is sucked between the pad 4 and the work when the upper mold 3 is raised and the mold is opened. In this case, it is possible to prevent foreign matter such as chips and dust from being caught in the processed surfaces 2a, 4 of the lower mold 2 and the pad 4.
It is possible to prevent the occurrence of the problem that foreign matter is caught in a and adheres to it.

According to the present embodiment having such a configuration, since the guide bush 12 and the guide post 11 of the guide means 10 also function as the cylinder and the piston of the compressed air generator 20, respectively, the press has been conventionally used. The press device 1 has a simple structure in which an upper lid 17, a check valve 18, a pressure regulating valve 19 and the like are added to the existing guide means 10 arranged in the apparatus 1, and the structure of the existing guide means 10 is the main part. The compressed air generating device 20 can be additionally provided, and it is not necessary to separately provide a dedicated compressed air generating device, and the facility cost can be suppressed without inviting the structure and complexity of the press device 1 to be complicated. Further, a work space for inspecting the press device and exchanging dies can be easily secured, and excellent workability can be obtained.

In the above-described embodiment, the lower die 2 is provided with the guide posts 11 and the upper die 3 is provided with the guide bushes 12 and the like to form the guide means 10 and the compressed air generator 20. While the guide bush 12 and the like are provided, the guide post 11 is provided on the upper mold 3 so that the tip 11a thereof projects downward, and the guide means 10 and the compressed air generator 2 are provided.
It is also possible to form 0. This configuration is particularly effective when supplying compressed air to the lower mold 2 side.

The case where the compressed air generating device 20 is formed in the guide means 10 for ensuring the relative positional accuracy of the lower mold 2 and the upper mold 3 has been described, but the upper mold 3 composed of the guide post and the guide bush is described. It is also possible to form a compressed air generating device having the same structure as described above on a guide means (not shown) for ensuring the positional accuracy of the pad 4.

The compressed air stored in the accumulator 23 can be utilized as an air blow for blowing off foreign matter attached to the working surfaces 2a, 4a of the lower mold 2 and the pad 4, and also for an actuator of a lifter or the like. It can also be used as a drive source for various air actuators, and can be used by supplying it to various compressed air use parts.

(Second Embodiment) A second embodiment of the pressing device of the present invention will be described with reference to FIGS. 6 to 10 by taking a piercing press device as an example.

FIG. 6 is an explanatory view schematically showing the piercing press device 31, and FIG. 7 is a sectional view showing the main part. In the piercing press device 31, an upper die 33 is arranged above a lower die 32 so as to be vertically movable.

The lower die 32 is provided with a pad 34, a punch 35 with a kicker, which penetrates the punch through hole 34a of the pad 34 and has a tip 35a protruding upward. Furthermore, a column-shaped scrap chute 36 is erected.

On the other hand, the upper die 33 has a punch 35 with a kicker.
Is provided with a punching die 37, and the punching die 37
A scrap discharge hole 38 for discharging the punched scrap Wa punched by is formed. The waste discharge hole 38 is a first discharge hole 3 extending from above the punching die 37 in a substantially horizontal direction.
8A and a second discharge hole 38B extending downward from the end of the first discharge hole 38A and facing the lower mold 32 and having a discharge port 38a opened. The scrap chute 36 can be fitted into the second discharge hole 38B, as shown in FIG.
When the upper die 33 rises to the top dead center position as shown in (a), an opening through which the punched waste Wa can be discharged is formed between the tip 36b formed in an inclined surface shape and the discharge hole 38a. .

The residue discharge hole 38 is provided at the tip 3 at the continuous portion of the first discharge hole 38A and the second discharge hole 38B, which are negative pressure use portions.
9a communicates with the negative pressure generator 40 via a conduit 39 having an opening. The conduit 39 is formed with a small diameter with respect to the waste discharge hole 38.

The negative pressure generator 40 has the same structure as the compressed air generator 20 of the first embodiment,
The conduit 39 is connected to the check valve 18. Therefore,
For the description of the negative pressure generating device 40, the same reference numerals as those in FIG. 1 and FIGS.

When the upper die 33 is lowered, the negative pressure generating device 40 has a tip of the guide post 11 erected on the lower die 32 as the upper die 33 descends from the top dead center position shown in FIG. As shown in FIG. 8, the relative position of the lower die 32 and the upper die 33 is introduced by the guide post 11 and the guide bush 12 into which 11a enters from the opening 12b at the lower end of the guide bush 12 provided in the upper die 33. Ensure accuracy. Further, as the upper die 33 descends, it further enters the guide bush 12 as shown in FIG. 9, and the tip 11a of the guide post 11 enters the guide bush 12 until the upper die 33 shown in FIG. 10 reaches the bottom dead center. .

Guide bush 1 of this guide post 11
The air in the guide bush hole 14 is compressed by the advancing operation in 2, and the compressed air is pressure-fed to the accumulator or the like via the pressure regulating valve 19 and the pipe line 22, is stored in the accumulator, and is appropriately used.

When the upper die 33 shown in FIG. 10 starts to rise from the bottom dead center, the guide post 11 gradually comes out of the guide bush 12, and is sealed as the guide post 11 comes out of the guide bush 12. The inside of the guide bush hole 14 becomes negative pressure, the check valve 18 opens, and the air in the waste gas discharge hole 38 is sucked through the pipe 39 to reduce the pressure in the waste gas discharge hole 38. When the upper die 33 is further raised, the guide post 11 is pulled out from the guide bush 12, the inside of the guide bush hole 14 is opened to the atmosphere, and the check valve 1
8 is configured to close.

Next, the press device 1 configured as described above.
The operation of will be described.

The upper die 33 is lowered from the top dead center position shown in FIGS. 6 and 7 (a) to hold the work W by the upper die 33 and the pad 34, and the tip 11a of the guide post 11 has the opening 12a. Enters into the guide bush 12. Further, the upper die 33 is lowered to the bottom dead center and the work W is punched by the punch 35 with kicker and the punching die 37 as shown in FIG. 7B. The punching waste Wa punched out by the kicker punch 35 is flipped up into the first discharge hole 38A by the kicker pin provided on the kicker punch 35.

Following the punching of the work W, the upper die 33 starts to rise from the bottom dead center. As the upper die 33 rises, the scrap chute 36 starts to move out of the second discharge hole 38B. On the other hand, in the negative pressure generating device 40, the guide post 11 starts to move out of the guide bush 12 from the state shown in FIG. 10, and the inside of the guide bush hole 14 becomes negative pressure. This guide bush hole 1
The check valve 18 is opened in association with the generation of the negative pressure in the valve 4, and the air in the refuse discharge hole 38 is sucked through the pipe 39.

When the upper mold 33 is further raised, FIG.
As shown in FIG. 7, the tip 35a is pulled out from the punching die 37 to the punch 35 with a kicker, and the open end of the scrap discharge hole 38 on the punching die 36 side is opened to the atmosphere through the punching die 37. By this opening, air flows into the residue discharge hole 38 from the outside through the punching die 37. Due to the inflow of the outside air, the scraps Wa are sucked in the first discharge holes 38A and the pipe 39
Is guided to the vicinity of the tip 39a.

Further, when the upper die 33 moves up to the top dead center position, the scrap chute 36 further comes out of the second discharge hole 38B as shown in FIG. 7 (d), and the tip 36b formed in the inclined surface shape. Punching waste Wa between the outlet 38a
Is formed, and the punched waste Wa is discharged from the opening.

According to the press device 31 having such a structure, the lower die 32 is provided with the kicker punch 35 and the tip 3 thereof.
Even when the so-called upward piercing process is performed in which 5a is provided upward and the punching die 37 is provided on the upper die 33, the scrap discharge hole 38 is formed.
Is reduced by the negative pressure generating device 40, and the punching die 37 side is opened to the atmosphere, whereby the punching waste Wa can be reliably guided and discharged.

Further, the guide bush 1 of the guide means 10
2 and the guide post 11 also have the functions of the negative pressure generating device 40 as a cylinder and a piston, respectively, the upper cover 17, the check valve 18, and the pressure regulating valve 1 are added to the existing guide means 10.
A negative pressure generating device 40 having the structure of the guide means 10 as a main part can be attached to the press device 31 with a simple configuration in which 9 or the like is added, and it is not necessary to separately provide a negative pressure generating device, and the press device is not required. The equipment cost can be suppressed without inviting the structure to be complicated and upsized, and the work space for inspecting and exchanging the die of the press device can be easily secured, and excellent maintainability can be obtained.

In this embodiment, the guide post 11 is provided on the lower die 32 and the guide bush 12 and the like are provided on the upper die 33 to form the guide means 10 and the negative pressure generating device 40. The guide bush 12 and the like are arranged in 32 and the guide post 11 is arranged in the upper mold 33 to guide the guide means 10.
Also, the negative pressure generating device 40 can be formed. The negative pressure generated by the negative pressure generator 40 may be stored in the accumulator and used as a drive source for various air actuators such as a lifter actuator.

Further, the case where the negative pressure generating device 40 is formed in the guide means 10 for ensuring the relative positional accuracy of the lower mold 32 and the upper mold 33 has been described, but the upper mold and the pad constituted by the guide post and the guide bush are formed. It is also possible to form a negative pressure generating device having the same structure as described above in the guide means for ensuring the positional accuracy of.

The present invention is not limited to the above-described embodiments, but can be variously modified without departing from the spirit of the invention. For example, in the first embodiment, the conduit 2
Although the external air is sucked from 1 through the check valve 18, the negative pressure generated in the conduit 21 may be stored in the accumulator 22 and used as a drive source such as an actuator.

In the second embodiment, the pressure regulating valve 19
Although the compressed air is stored and used in the accumulator or the like via the negative pressure generating device 4 instead of the pressure regulating valve 19.
It is also possible to provide a check valve for discharging the compressed air in 0. With this configuration, when the guide post 11 enters the guide bush 12 and the pressure in the guide bush hole 14 rises as the upper die 33 descends, compressed air is released to the outside via the check valve. , Guide bush hole 1
It is possible to ensure a smoother operation of the negative pressure generating device by suppressing the pressure increase in 4.

[0062]

According to the above-described pressing apparatus of the present invention, the tip of the guide post provided on one of the lower die and the upper die as the upper die descends into the guide bush hole formed in the other. In a press device equipped with a guide means that is fitted into a fitted guide bush to ensure relative positional accuracy between the lower die and the upper die, a guide bush sealed by the guide post entering into the guide bush when the upper die descends. Since the compressed air generating device for generating compressed air is provided in the hole, the guide bush and the guide post of the guide means also function as the cylinder and the piston of the compressed air generating device, and are conventionally provided in the press device. It is possible to attach a compressed air generator mainly composed of existing guide means, which is a dedicated compressed air generator. It is not necessary to dispose, equipment cost suppressed without complicating and enlargement of the structure of the pressing device. Further, a work space for inspecting the press machine and exchanging dies can be easily secured, and excellent workability can be obtained.

According to another invention, the tip of a guide post provided on one of the lower die and the upper die is fitted into a guide bush hole formed in the other die as the upper die descends. In a press machine equipped with guide means that fits into the guide bush and secures the relative positional accuracy of the lower die and the upper die, in the guide bush hole sealed by the withdrawal operation of the guide post in the guide bush due to the rise of the upper die Since the negative pressure generating device for generating the negative pressure is provided in the, the guide bush and the guide post of the guide means also function as the cylinder and the piston of the negative pressure generating device, and are conventionally arranged in the press device. It is possible to attach a negative pressure generating device whose main part is the structure of the existing guide means, and it is not necessary to provide a dedicated negative pressure generating device separately, Equipment cost without complicating and enlargement of the structure of the apparatus can be suppressed. Further, a work space for inspecting the press device and exchanging dies can be easily secured, and excellent workability can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a main part of a first embodiment of a pressing device according to the present invention.

FIG. 2 is likewise a schematic explanatory view of a press device.

FIG. 3 is likewise an explanatory view of the operation of the press device.

FIG. 4 is likewise an explanatory view of the operation of the press device.

FIG. 5 is likewise an explanatory view of the operation of the press device.

FIG. 6 is a schematic explanatory diagram of a second embodiment of a pressing device according to the present invention.

FIG. 7 is likewise a cross-sectional view of the main parts of the pressing device.

FIG. 8 is likewise a schematic explanatory view of a press device.

FIG. 9 is likewise a schematic explanatory view of a press device.

FIG. 10 is likewise a schematic explanatory view of a press device.

FIG. 11 is a cross-sectional view of a main part of a conventional pressing device.

[Explanation of symbols] 1 Press machine 2 Lower mold 3 Upper mold 10 Guide means 11 Guide post 11a tip 12 Guide bush 14 Guide bush hole 18 Check valve 19 Regulator (check valve) 20 Compressed air generator 25 ejection holes (compressed air use part) 31 Press machine 32 Lower mold 33 Upper mold 35 punch with kicker 37 punching die 38 Dust discharge hole (negative pressure part) 40 Negative pressure generator

Claims (5)

[Claims] 1. A lower die and an upper die that moves up and down so as to face the lower die, and a tip of a guide post provided on one of the lower die and the upper die as the upper die descends. In a press device equipped with guide means that is fitted into a guide bush that is fitted into a guide bush hole that is bored on the other side to secure the relative positional accuracy of the lower die and the upper die, A press device comprising a compressed air generating device for generating compressed air in a guide bush hole sealed by a guide post entering the guide bush. 2. The compressed air generating device comprises a check valve for introducing outside air into the guide bush hole and a check valve for supplying compressed air in the guide bush hole to a compressed air use portion. The press device according to claim 1. 3. The press device according to claim 2, wherein the check valve for introducing the outside air communicates with a negative pressure using portion. 4. A lower die and an upper die that moves up and down so as to face the lower die, and a tip of a guide post provided on one of the lower die and the upper die as the upper die descends. In a press device equipped with guide means that is fitted into a guide bush that is fitted into a guide bush hole that is bored on the other side to secure the relative positional accuracy of the lower die and the upper die, A press device comprising a negative pressure generating device for generating a negative pressure in a guide bush hole sealed by a withdrawal operation of a guide post in a guide bush. 5. The negative pressure generating device includes a check valve for blocking an air flow from the inside of the guide bush hole to a negative pressure using portion and a check valve for discharging compressed air generated in the guide bush hole to the outside. The press device according to claim 4, further comprising: